Computing and printing machine



Aug. 3, 1937. o. J. SUNDSTRAND COMPUTING AND PRINTING MACHINE ,14 Sheecs-Sheet 1 Filed June 26,, 192 6 jzmzzw fund/straw M M Aug 3, 19370 o. J. SUNDSTRAND 2,088,932

COMPUTING AND PRINTING MACHINE Filed Juhe 26, 1926 14 Sheets-Sheefi 2 fzvevzw: Oacar .I 'urzzdstrand;

g v um n u a Aug. 3, 193 7.

0. J. SUNDSTRAND COMPUTING AND PRINTING MACHINE l4 Sheets-Sheet.- 5

Filed June 26, 1926 scan" a 5 rand 6, W 64 M @a Aug. 3, 1937. o. J. SUNDSTRAND COMPUTING AND PRINTING MACHINE Filed June 26, 1926 14 Sheets-Sheet 4 I ts-Sheet Nu I I. 1 1 4 mans. I ewfi $3 5 I gm) 1 m Q1 0 J SUNDSTRAND COMPUTING AND PRINTING MACHINE Fild June 26. 1926 3 m cw KL u A COMPUTING AND PRINTING MACHINE 1 Filed June 26. 1926 14 Sheets-She et, e

05501 I umws tra nay,

a, v w J Mu m v m 9 e a 8 m .7 8 S F J .Tu 0 .r W s a Mg .39 m a WW S A fi/IJI.|J w. 0 v m bw u T m MQ w m Raf Q a m M a. m MW 2 g m w 55 g D R e n N P n a U D u I s m J d m m I F O m m Nb w Hp "I. v T 1 2 @NQNJ Y $6M w 7. .A w m 9% Aug. 3, 1937. o. J. SUNDSTRAND 2,088,983

COMPUTING.,AND PRINTING MACHINE Filed June 26. 1926 14 Sheet-Sfieqt s Aug. 3, 1937. o. .1. SUNDSTRAND 8 2 COMPUTING AND PRINTING MACHINE Filed June 26, 1926 14 Sheets-Sheet 9 U" Q M Q g3 N 1 S 3,

14 Sheets-Sheet 10 O J SUNDSTRAND COMPUTING AND PRINTING MACHINE Filed June 26, 1926 Aug. 3, 1937.

14 Sheets-Sheet 11 lfivenzfir: Oscar I fi'undam/nd 4 M 541 M O J SUNDSTRAND COMPUTING AND PRINTING MACHINE Filed June 26, 1926 3 3 1 Emma a; 3133;;

Aug. 3, 1937. o. J. SUNDSTRAND 2,088,982

COMPUTiNG AND PRINTING MACHINE Filed June 26, 1926 14 Sheets-Sheet l2 mGNN Aug. 3, 1937. o. J. SUNDSTRAND COMPUTING AND PRINTING MACHINE Filed June 26, 1926 14 Sheets-Sheet l3 0.50m" I 52L maisrand,

Patented Aug. 3, 1937 UNITED STATES PATENT OFFICE COMPUTING AND PRINTING MACHINE Oscar J. Sundstrand, Rockford, Ill., assignor, by mesne assignments, to Underwood Elliott Fisher Company, New York, N. Y., a corporation of Delaware Application June 26, 1926, Serial No. 118,628

54 Claims.

This invention has particular reference to machines which are adapted for use in making entries upon ledger sheets and in preparing statements for customers. In such work the statement sheet or the ledger sheet, or both, are supported upon a carriage which is arranged for lateral movement to carry the paper horizontally past the printing mechanism, means being provided to arrest the carriage at each columnar position required by the statement or ledger sheet.

In machines of this class it is desirable that means be provided for automatically controlling various mechanisms of the computing machine so that the proper operation shall occur at each columnar position, as, for example, the printing of a date, or the printing and nonaddition of a folio, or addition, or subtraction, or the taking of a spacing stroke of the handle, or the printing of the total. A particular object of the present invention is to provide improved construction for controlling various computing machine mechanisms, said control means being of a compact nature capable of being readily incorporated in a computing machine without reorganization of the latter.

In prior machines of the class referred to, the stops carried by the carriage for coaction with the carriage escapement and the devices that control the various mechanisms of the machine have been more or less complicated and thus liable to misadjustment by the operator. One of the objects of this invention is to provide simple and inexpensive stop means on the carriage which shall obviate any possibility of misadjustment. This feature of the invention is herein shown as embodied in a plate having permanently fixed thereto stop pins capable of effecting the operations required by the particular form of state ment or ledger sheet to be used, and thus requiring no attention or care on the part of the operator. The stop plate is made readily attachable to and detachable from the carriage so that when a different printed form is to be used the operator may conveniently substitute a stop plate corresponding to the character of the work in hand.

Another object is to provide simple and eflective means for controlling the printing of dates, for effecting repeated printing of a desired amount, for effecting printing of the total without clearing of the machine, for effecting nonaddition, for effecting printing of the total accompanied by clearing of the machine, and for controll ng platen feed or line spacing.

Another object of the invention is to provide means for introducing the additional unit required in order that the correct total shall be printed when the total is an over-draft or credit balance. This feature of the invention is useful in machines which are not provided with a crosstabulating carriage such as heretofore referred to.

A further object is to provide meanswhich is sensitive to the positive or negative character of the total contained in the machine for automatically conditioning the machine to print the correct total, thus obviating the necessity of means for warning the operator when the machine contains a negative total and means for manually conditioning the machine for the printing of such a total.

In the accompanying drawings:

Figure l is a fragmental longitudinal vertical sectional view of one form of machine embodying the features of my invention, the view being taken from the right-hand side of the machine.

Fig. la is a fragmental view of the carriage escapement mechanism.

Fig. lb is a fragmental view of the tabulating mechanism, i. e., the mechanism for moving the carriage from one position to the next without operating the handle.

Fig. 2 is a View generally similar to Fig. 1.

Fig. 3 also is a view generally similar to Figs. 1 and 2, but showing the carriage in its extreme left-hand position, the handle having started on its return stroke, with the parts in position to print a grand total.

Fig. 3a is a detail view of the cam I48.

Fig. 4 shows the handle in its extreme forward position in the taking of a spacing stroke for the purpose of placing the totalizer in mesh with the front or subtracting racks, there being a credit balance in the machine.

Fig. 5 shows a fragmental view of the machine in initial position, there being a debit or positive balance in the machine.

Fig. 5a is a detail view of the right-hand lever I39.

Fig. 6 is a view showing how the computing mechanism is set for subtraction by the conjoint action of the paper carriage and the operating handle.

Fig. '7 is a fragmental plan section of a portion of the means for controlling the computing mechanism in the manner just referred to.

Fig. 8 is a fragmentary illustration of the machine, the handle being in the initial position, there being a credit balance in the totalizer and an amount having been set up on the keyboard.

Fig. 9 is a fragmentary front view.

Fig. is a fragmental view from the lefthand side of the machine with the parts in the initial position.

Fig. 11 is a fragmental plan view illustrating the computing mechanism (the racks being omitted), the means for setting said mechanism for subtraction, and the means for controlling said setting means in accordance with the character (i. e., positive or negative) of the total in 10 the totalizer.

Fig. 12 is a fragmental right-hand view showing more particularly the non-add mechanism.

Fig. 13 is a fragmental view of the printing and computing mechanism.

Fig. 14 is a generally similar view, but showing the mechanism for introducing the fugitive unit, said unit having just been introduced at the subtracting side of the machine.

Fig. 14a is a perspective detail view of certain parts comprised in the means for controlling the means for operating the computing mechanism in accordance with the character of the total.

Fig. 15 is a view similar to Fig. 14, the fugitive unit having just been introduced at the adding side of the machine.

Fig. 15a is a fragmental perspective view of the means for introducing the fugitive unit.

Fig. 16 is a fragmental rear view.

Fig. 17 is a fragmental view from the left-hand side of the machine, showing the means for actuating the line-space mechanism.

Fig. 18 is a fragmental View from the lefthand side showing the means for controlling the date and symbol type bars.

Fig. 18a is a detail view of a slide comprised in the means for controlling line-spacing and non-printing.

Fig. 19 illustrates the keyboard.

Fig. 20 is a fragmental View of the means for turning the right-hand platen section to effect line-spacing.

Fig. 21 is a fragmental view looking from the front, illustrating the means for controlling the computing mechanism.

5 Figs. 22 to 29, inclusive, are detail views of devices by which the carriage is controlled and by which the carriage controls various adding machine mechanisms.

Fig. 30 is a view more or less diagrammatic 5 showing the two platen sections, the statement supported by one platen section, the ledger sheet carried by the other platen section, and the detachable stop plate carried by the platen carriage.

5 Fig. 31 is a detail view of the rock shaft to which the stop plate is attached.

Figs. 32 and 33 are sectional views of the stop plate and adjacent parts.

Fig. 34 is a plan view illustrating the parts 3 shown in Figs. 18 and 22 to 29.

The invention is herein shown as embodied in a machine of the general character disclosed in the Sundstrand Patents Nos. 1,198,487, 1,481,487 and 1,583,102, although it will be understood that 5 the invention is not limited to machines of the Sundstrand type. Reference may be made to the above mentioned patents for an understanding of features not fully illustrated or described herein. Certain other features which are herein disclosed in part are more fully described and illustrated in my application Ser. No. 670,665 filed October 25, 1923 (now Patent No. 1,965,611, granted July 10, 1934).

The paper on which records are to be made is 5 supported upon a carriage (Fig. 1) which is mounted for lateral movement on top of the rear portion of the supporting framework F of the machine. On the carriage I is a cylindrical platen 2 (Fig. 30) Herein the platen is indicated as consisting of two sections 2 and 2 axially alined and capable of independent manual rotation, but arranged to be simultaneously rotated by mechanical means common in the art.

The printing is effected by means of vertically reciprocatory type bars 3 (Fig. 13) which are raised and lowered by means including arms I3 (Figs. 16 and 18). Said arms are yieldingly con nected through coiled contractile springs 14 to a rod I5. The latter is carried by two side members 16 the upper ends of which are pivoted at l6 to three-arm levers I 9 that are pivoted on the axis l9 (Figs. 3 and 17). Links 23 (Fig. 1) are pivoted to the lower ends of the levers 19 at 23 the forward ends of said links being pivoted to two crank arms 24 and 25 (Figs. 1 and 10) fixed to opposite ends of a rock shaft 26. The shaft 26 is arranged to be rocked by means of a handle 21 mounted to swing on the axis 28. The handle 21 is connected to the arm 24 by means which may be of any preferred character as, for

example, that shown in the Sundstrand Patent No. 1,611,390. It will, of course, be understood that an electric motor may be used to rock the shaft 26, if desired.

When the operator pulls the handle 21 forward, the arms 24 and 25 swing upwardly, thereby drawing the lower ends of the levers I9 forwardly and moving the side members 16 and the rod 15 downwardly. The movement of the rod 15 is yieldingly transmitted through the springs 14 and the arms l3 to such of the type bars 3 as are at liberty to rise. The means for restoring the type bars to their normal down position may be of any Well known or preferred construction as, for example, that shown in my application Serial No. 670,665.

The means for limiting the ascent of the type bars which print amounts and folio numbers may be like that disclosed in Patent No. 1,198,487. The extent of rising movement of the type bars that print dates and explanatory symbols may be determined by means such as that described in Patent No. 1,481,487.

The keyboard is shown in Fig. 19. 49 are the numeral keys by means of which numbers are set up in the group of stops (not shown). The means for eliminating a number from the stops is fully described in Patent No. 1,198,487 and comprises a bar 12 (Fig. 10) provided with a roller stud 13. A bar 14 guided for movement alongside the bar 12 is arranged to be reciprocated in the movement of the handle 21. A spring 11 normally holds the bar 14 up so that its forward end will strike the stud 13 and thus push the bar 12 forward, thereby eliminating the number set up in the stops.

When a number is to be printed or accumulated more than once, the bar 14 is held down so as not to engage the stud 13. The repeat or multiplying key 84 (Fig. 19) provided for this purpose is described in Patent No. 1,198,487.

The back-spacer key 86 may be connected and arranged in any preferred manner or as shown in the Sundstrand patents hereinbefore mentioned. The non-print key 120 may be connected to the hammer-release mechanism as in the Sundstrand Patent No. 1,455,555, or in any other desired way.

For a full disclosure of certain features of the computing mechanism, reference may be made to my application Ser. No. 670,665 filed October 25, 1923. Said mechanism comprises a series of pinions I (Fig. 13) rotatably mounted upon a transverse shaft I26 which is supported for movement longitudinally of the machine, i. e., backward and forward. The set of pinions I25 is located between two sets of racks I29 and I39 which constitute differential mechanism. Both sets of racks are connected to the type bars that print amounts and folio numbers, and the set of pinions is arranged to be moved into mesh with either set of racks.

Addition is accomplished by means of the set of racks I30. When an amount is to be added the set of pinions is moved forward into neutral position between the two sets of racks before the type bars are raised, and the set of pinions is moved rearwardly into mesh with the racks I36 just before the type bars are moved downwardly. Addition therefore occurs in the down stroke of the racks I30.

Subtraction is accomplished by rotating the pinions I25 in the reverse direction by means of the racks I29, subtraction occurring in the downstroke of said racks.

The upper end of, each rack is attached to a rearwardly extending portion I3I of one of the type bars by means of a headed stud I32 extending through a vertically elongated opening I38 in the rack. A contractile spring I34 attached at its upper end to the rack at I34 and at its lower end to a downwardly-extending portion I35 of the type bar tends to move the rack downwardly one tooth space with relation to the type bar. The backs of the racks slide in grooves in stationary guide bars I36.

The pinions I25 are moved into and out of mesh with the racks I29 and I39 by means of two links I31 (Fig. 5) one at each side of the machine, the forward ends of which have bearings to receive the ends of the shaft I26. The rear ends of the links I31 are pivoted at I38 to the lower arms of two levers I39 (Figs. 5 and 5a) which are rigidly secured to a shaft I49 journaled in the machine frame. When the levers I39 are in the position shown in Fig. 5, the pinions are in neutral position. When the levers I39 swing clockwise out of such position, the pinions move into mesh with the subtracting racks I29; and when the levers I39 swing counterclockwise out of. such position the pinions move into mesh with the adding racks I36. The means for swinging the levers I39 to move the pinions into and out of mesh with the racks comprises a link I4I (Fig. 6) the forward end of which is supported by a lever I4I pivoted at I4I The rear end of the link is provided with notches I I-2 and I43 to receive pins I44 and I45 (Fig. 5a), respectively, on opposite ends of the right-hand lever I39. Rearwardly of the notches I42 and I43 are lugs I46 and I41, respectively, which serve to prevent disengagement of the lever I39 from the link I4I. Forwardly of the notches I42 and I43 are curved surfaces adapted to slide in contact with the pins I44 and I45.

The link I 4! is moved forward and back by means of an oscillatory cam plate I48 (Fig. 3a) having a cam slot I49 therein, said cam plate being pivoted at I59 (Fig. 2). On the forward end of the link MI is a roller that lies in the slot I 49.

The means for oscillating the cam I48 comprises a reversible pawl I52 (Figs. 2 and 6) which is pivoted at I53 upon a plate I54 rigidly secured to the arm 24. One side of the pawl is adapted to engage a pin I56 (Fig. 2) set in the cam plate I 48 at one side of its axis I50, the other side ofv the pawl being adapted to engage a pin I51 (Fig. 3) fixed in the cam I48 at the opposite side of its axis.

When a number is to be added or subtracted, the pawl I52 is permitted to engage the pins I56 and I51 so as to swing the cam I48 to effect movement of the pinions into and out of mesh with the racks.

When a total (whether subtotal or final total) is to be printed the pawl I52 is not permitted to engage the pin I56; consequently, the cam I40 is not moved during the forward stroke of the handle 21, and the pinions remain in mesh with the racks during the rising of the latter, thereby effecting the positioning of the type bars for the printing of the total.

The means for controlling engagement of the pawl I52 with the pin I56 includes an arm I59 (Fig. 3) pivoted at I60 in the machine frame, the upper end of said arm being adapted to hold the pawl I52 out of position to engage said pin. As explained in application Serial No. 670,665, after a spacing cycle or a total-taking cycle and until a number has been set up in the stop mechanism, the arm I59 is in its forward position. As soon as a digit is set up in the stop mechanism, the arm I59 swings rearwardly away from the pawl I52 and leaves said pawl in position to engage the pin I56 when the handle 21 is pulled. When a debit or credit total is to be printed, the pawl I52 is held out of engagement with the pin I56; consequently the cam I48 is not moved during the forward stroke of the handle 21 and the totalizer remains in mesh with the racks during the rise of the latter, thereby effecting the positioning of the type bars for the printing of the total.

When it is not desired to clear the machine after printing a debit total, the totalizer is allowed to remain in mesh with the racks I30 during the downward movement thereof. When, however, the operator wishes to clear the machine of a debit total, the pinions are withdrawn from the racks I39 before the latter descend. The means for swinging the cam I48 to effect such movement of the pinions comprises a lever I64 (Fig. 2) pivoted on the shaft 26 and having a cam slot I65 in which lies a roller I66 on the cam I48. The lever I64 has an arm I61 (Fig. 3) which is arranged to be engaged by a pin (not shown) on the arm 24. The means for swinging the lever I64 forward to disengage the pinions from the racks I30 is controlled by a clear or grand total key I69 (Fig. 3) having a stem I19. On the stem I10 is a stud III that underlies the forward end of a lever I12. The lever I12 has an elongated opening I13 through which a pivot rod I14 extends, the lever I12 thus being movable longitudinally to a slight extent. A contractile spring I15 tends to slide the lever I 12 rearwardly. I16 is a contractile spring stretched between a pin on the stem I10 and the front end of the lever I12 and tending to hold the pin HI and the lever I12 in contact with each other. During the printing of an amount and during the enforced blank or spacing stroke of the handle prior to the taking of a total, the lever I12 is held against movement by the spring I16 by means fully described in application Ser. No. 670,665. After the blank stroke has been taken, if the total key I69 be depressed, the rear arm of the lever I12 is permitted to rise under the influence of the spring I16 during the next forward stroke of the handle,

so as to place a shoulder I93 on the lever I12 behind a pin I94 on the lever I64. Very shortly after the handle 21 has commenced its return stroke, means fully described in said application 5 Serial No. 670,665 pushes the lever I12 forward, thus pushing the lever I64 forward, thereby swinging the cam I48 upward and thus pulling the link I4I forward. Said link being in engagement with the pins I45 on the lever I39, the pinions are moved forward out of mesh with the racks I30 and thus left standing at zero.

Referring now to the transfer mechanism (best shown in Fig. 13) 2 There is a set of transfer devices for the racks I30 to carry amounts from one 15 numerical order to the next higher order in operations involving addition, and a set of transfer devices for the racks I29 to carry amounts from one numerical order to the next higher order in operations involving subtraction. The extent of downward movement of the tens and higher racks is limited (except in the transfer operation) by contact of lugs 203 on the racks with stop lugs 204. When an amount is to be transferred from one order to the next higher order, the stop lug 204 for the rack belonging to such higher order is withdrawn, thereby allowing that rack to descend under the action of its spring I34 until its lug 203 stops against the bar I36 as indicated in the right-hand portion of Fig. 15. The extent of such further descent of the rack is just sufficient to turn the pinion for that rack through the distance of one tooth. Each stop lug 204 is formed on an arm or pawl 205 which is pivoted on a rod 206 in the framework of the machine.

To the lower end of each pawl 205 is pivoted a dog 201 having a tooth 208 adapted to engage the edge of the adjacent bar I36. A contractile spring 209 normally holds the tooth 208 in engagement with the bar I36, the lug 204 being then 40 in position to support the corresponding rack.

The means for disengaging the tooth 208 from the bar I36 consists of two diametrically opposite lugs 2 I0 fixed to one side of each pinion. (Two lugs 2I0 are provided because each pinion has twenty teeth.) When the amount registered by a pinion reaches nine, continued rotation of the pinion as its rack descends brings one of the lugs 2I0 against the end of the dog 201 associated with the next higher rack, thereby depressing the dog until the tooth 208 is clear of the bar I36,

whereupon the spring 209 (assisted by the downward pressure of said next higher rack) pulls the dog and the pawl 205 away from the last mentioned rack, the latter then moving down one tooth space under the influence of its spring I34,

being stopped by the bar I36.

It may be here stated that when any pinion stands at zero, one of the lugs 2I0 on said pinion lies directly beneath one of the dogs 201 associated with the set of racks I30 if the amount accumulated is a debit or positive amount, or directlybeneath one of the dogs 201 associated with the group of racks I29 if the amount accumulated be a credit or negative amount. There fore, when a total is to be printed, those racks which mesh with the pinions standing at zero cannot rise, the remaining racks rising until the rotation of their pinions brings the lugs 2I0 thereon into contact with the respective dogs 201. The

type bars 3 are then in position to print the total amount accumulated on the pinions.

If a debit or positive amount has been accumulated in the machine, and one or more amounts are subtracted so as to leave a credit or negative total in the machine, the true credit or negative total cannot be printed until the credit or negative total in the machine has been increased by one unit. Similarly, if a credit or negative total be converted into a debit or positive total by the addition of amounts, the correct total cannot be printed Without first adding a unit to the total in the machine. In other words, in order that the correct total shall be printed it is necessary to introduce a unit into the totalizer whenever the totalizer has passed through zero. In order to effect this result automatically, I have provided the means to be now described.

The units rack I29 is arranged to be supported in normal position by means of a pawl 2I0 (Fig. 14) which is pivoted upon the rod 206 and is arranged to support the lug 203 on said units rack. When the fugitive l is to be introduced into the totalizer, the pawl 2H3 is moved out of engagement with the lug 203 of the units rack, whereupon the spring I34 for said rack moves the rack down one tooth space and thus turns the units pinion the same distance. The means for thus moving the pawl 2I8 at the time the totalizer passes through zero comprises two diametrically opposite lugs 2I8 (Fig. 11) on the pinion of highest order, said lugs being arranged to engage a dog 2H3 (Fig. 15a) which may be and preferably is identical in form with the dogs 201. The dog M8 is pivot-ally supported upon a member 2H3 which is pivoted on the rod 206. For simplicity of manufacture, the member 2I8 has a lug like that of the pawl 2I8 although it has no rack-supporting function. Each of the members 2H3 and 2l8 are provided with upwardly extending arms 2I8 which are rigidly connected together by means of a cross bar or plate H8.

Let it be assumed that the amount 3 has been accumulated or added by operation of the adding racks I30. The units pinion will therefore stand with one of its lugs 2I0 three spaces below the zero position on the adding side of the machine, the corresponding lugs 2I0 of the other pinions lying directly beneath the dogs 201 at the same side of the machine. The diametrically opposite lugs 2I0 are above the horizontal plane of the dogs 201 at the subtracting side of the machine. Assuming that 5 is to be subtracted, the pinions are first moved out of mesh with the racks I30, and after the units rack I20 has been raised to the position for registering 5, the pinions are moved into mesh with the racks I29, whereupon the units. rack I29 descends, thus turning the units pinion five tooth spaces. In the course of such turning movement, one of the lugs 2I0 on the units wheel is carried into engagement with the end of the dog 201 associated with the tens rack I29, thereby disengaging said dog from the bar I36 and thus allowing said tens rack to descend one tooth space. Said tens rack being in mesh with the tens pinion, the latter was caused to turn through one tooth space, whereby the lug 2I0 on said tens wheel tripped the dog 201 for the hundreds rack, and so on from pinion to pinion. An impulse was thus transmitted from the units pinion to the pinion of highest order so as to place one of the lugs 2I0 on all the pinions except the units pinion directly below the normal horizontal plane of the dogs 201 at the subtracting sde of the machine. The rotation thus imparted to the wheel of highest order served to disengage the dog 2| 8 from the bar I36, whereupon the corresponding spring 209 moved said pawl and the member 2I8 forward, the forward swing of the member 2I8 being transmitted through the arms 2I8 and the plate 2H3 to the pawl 2I8 whereby the units rack I29 was allowed to descend an additional tooth space, thus introducing the fugitive l.

5 The means for introducing the fugitive 1 at the adding side of the machine is like that just described, and similar reference numerals have been applied to the parts in the drawings.

For an understanding of the means for restoring the transfer pawls 205, the transfer dogs the dog 2I8, the pawl 2I8 and the member 2I8 reference may be made to application Serial No. 670,665.

When the machine is clear, the link MI is in engagement with the pin I45, the pinions being then in mesh with the racks I30. Reciprocation of the link I4I will therefore shift the pinions into and out of mesh with those racks. When an amount is to be subtracted, the link MI is shifted. into engagement with the pin I44. The means for shifting the link I4I comprises a lever 2I9 (Fig. 1) pivoted at 220 in the machine frame and having a forked rear end which engages a pin 22I on the link MI. The lever 2I9 has a downwardly extending arm 222 to which is attached a contractile spring 223 that serves to raise the lever 2I9 and hence the link MI. The spring 223 is controlled by means including a subtraction key 224 having a vertically movable stem 225. A contractile spring 226 normally holds the subtraction key elevated. On the stem 225 is a pin 22! that overlies a forwardly extending arm 228 pivoted at 229. Rigid with the arm 228 is a. downwardly extending arm 230. A contractile spring 23I connected to the arm 230 tends to draw said arm forward, said spring, as-

sisted by gravity, tending to place the link MI in position to condition the registering mechanism for a positive operation. The computing mechanism is locked in position to subtract by means of a finger 232 fixed to one end of a rock shaft 233 and adapted to overlie the arm 228. To the other end of the shaft 233 is fixed a finger 234 (Figs. 8 and 9) to which is attached a spring 235 tending to draw the finger 234 rearwardly. The lower end of the finger 234 normally bears against a roller 236 carried by the slide bar 72. When an amount is set up by depression of the keys 49, the bar I2 moves rearwardly (to the right in Fig. 8) thus allowing the spring 235 to swing the finger 232 rearwardly. When the arm 228 is swung downwardly it slips past the finger 232, whereupon said finger swings back over said arm, as shown in Fig. 6.

To the arm 233 is pivoted a link 240 which has a lost-motion connection with the arm 222 consisting of a headed stud 24! on the arm 222 extending through an elongated hole 242 in the link (Fig. 1). The spring 223 is anchored to the GO link 240. When the machine is clear, and also when there is a debit balance in the machine,

the link MI is in engagement with the pin I45.

When an amount is to be subtracted, the link 240 is moved rearwardly, thus moving the rear end wall of the opening 242 away from the stud 24I.

When the handle is pulled, the link MI is drawn forward, as before explained, to withdraw the pinions from the racks I30 before the racks rise.

The forward movement of the link I4I causes the lever I39 to rock, as a result of which the pin I44 is brought into register with the notch I42. Thereupon the spring 223 lifts the lever 2 I9,

thus placing the notch I42 in engagement with the pin I44. In the return stroke of the handle, the link MI is pushed rearwardly, thereby rocking the lever I39 in the direction to place the pinions in mesh with the racks I29 before the latter start down. In the descent of the racks, the amount is subtracted. At the end of the return stroke of the handle, the finger 232 is withdrawn from the arm 228. In the next forward stroke of the handle, the link MI is drawn forward to place the pinions in central position before the racks ascend.

In work of the character shown in Fig. 30, the next record to be made after a credit entry is the folio, which, of course, is not to be added. Non-addition is effected by means acting to prevent the pawl I52 (Fig. 3) from engaging the pin I51 so that the pinions I25 shall remain in central position during the down stroke of the racks. The non-add mechanism is fully described in application Ser. No. 670,665 and hence it is sufficient to say that it comprises a slide 255 (Fig. 6) arranged, when in its rear position, to be engaged by a pin 259 on the pawl I52 and thus prevent the pawl I52 from engaging the pin I51 in the backward movement of said pawl. A spring 258 tends to draw the slide rearwardly. The means for releasing the slide to the action of the spring 258 comprises a non-add key 264 (Fig. 19).

The machine is preferably arranged to print totals in a color contrasting with the remainder of the work, as, for example, totals in red, and. the rest of the work in blue. The ribbon shift mechanism may be of any preferred character.

The paper carriage I is mounted on top of the framework of the machine for lateral movement. Any well known or preferred means may be employed to move the carriage toward the left, a portion of the carriage-moving spring I000 being shown in Fig. 16. If desired, motive means may be used to return the carriage to initial position at the right of the machine, or the carriage may be drawn to the right by the operator, as in the present instance.

The carriage I is arranged to control various mechanisms, as for example, the repeat mechanism, the date and symbol printing mechanism, the non-add mechanism, the grand total taking or clearing mechanism, the non-print mechanism, the mechanism that sets the computing mechanism to perform subtraction, and the line space or paper feed mechanism. The controlling mechanism comprises a compact group of slides, each connected to one of the adding machine mechanisms to be controlled, said group of slides being located in the path of stop pins attached to the paper carriage I.

Referring first to the means for automatically controlling the printing of dates and symbols: The three type bars farthest to the left are employed to print dates and symbols, as indicated in Fig. 19. The stops which control these type bars are set by sliding one or more of the buttons 5I I to appropriate positions as described in Patent No. 1,481,487. This is done at the beginning of the operation of posting to an account. In order that the date or symbol shall be printed only at the desired time or times during the travel of the carriage I, I provide the following described means: The arms I3 (Figs. 16 and 18) which raise and lower the date and symbol type bars have shoulders IO0I arranged to be engaged by lugs I002 (Fig. 34) on a bar I003 mounted to slide transversely of the machine. A spring I004 normally holds a shoulder I005 (Fig. 16) on the bar I003 against an abutment I006, in which position of the bar the lugs I002 are directly behind the shoulders IOI on the arms I3. The means for moving the bar I003 to place the lugs I002 out of register with the shoulders IO0I comprises a slide I001 (Fig. 28) arranged to bear against one end of the bar I003 and having a lug I008 arranged to be engaged by one or more stop pins I009 (Fig. 30) on the lower side of an elongated stop plate IOI0 attached to the carriage I. The forward edge of the stop plate I M 0 is secured 19 to a rock shaft IOII (Figs. 1 and 31) mounted in the carriage I, operating levers IOI2 and IOI3 (Figs. 1 and being fixed to the ends of said shaft. A spring IOI4 (Fig. 32) anchored to a pin IOI5 on the carriage is connected to an arm 1 IOI6 fixed to the rock shaft MI I, and normally holds the rear edge of the stop plate against a guide roller I 0H5 on the frame that contains the group of slides hereinbefore alluded to. A lug IOI1 on said arm serves to limit upward movement of the stop plate by stopping against the pin IOI5. The stop plate may be, and preferably is, detachably connected to the rock shaft IOI I. Herein said shaft is shown as having a flat upper side against which the plate may lie, there being a cylindrical pivot pin IOI8 (Fig. 31), three headed pins IOI9 and, a short cylindrical locking pin I020 on the shaft to enter a hole I02I, three notches I022 and an opening I023, respectively, in the stop plate. To connect the stop plate to the shaft IN I, the plate is fitted onto the pivot IOI8 and then swung toward the shaft, the edge having the notches I022 therein being pushed under the headed pins IOI9, and the plate being slipped onto the locking pin I020. The headed pins IOI9 are acted upon by expansive springs I024 (Fig. 33) which serve to hold the stop plate down against the rock shaft.

When in the leftward travel of the paper carriage one of the stop pins I009 on the stop plate IOI0 strikes the lug I008, the slide I001 and the bar I 003 are moved leftward until said slide stops against the abutment I006, thereby moving the lugs I002 out of the way of the shoulders IO0I, so that when the handle 21 is pulled one or more of the date and symbol type bars 3 may rise to the extent determined by the operation of the buttons 5| I. One or more stop pins I009 may be provided on the stop plates, depending upon the nature of the work, all of said pins being located 5 in a line parallel with the direction of travel of the carriage. Upon the return movement of the carriage, the stop pin or pins I009 slide over the beveled side of the lug I008, the stop plate tilting to allow the pins to pass said lug.

The means for automatically controlling the repeat mechanism comprises a rod I025 (Fig. 16) mounted to slide transversely of the machine into and out of position to depress the bar 14 (Fig. 10) so that the latter shall not engage the stud 13. The outer end of the rod I025 is connected to one end of a lever I026 which is pivoted at I021, the other end of said lever being connected to a slide I028. The slide I028 is guided at the rear end of the machine for transverse movement. One end of the slide I028 is connected to a slide I029 (Fig. 29) which is similar to the slide I001 and arranged adjacent thereto. On the slide I029 is a lug I029 adapted to be engaged by one or more stop pins I030 on the stop plate I0I0. A contractile spring I03I (Fig. 16) connected to the slide I028 normally holds the pin I025 out of the path of movement of the bar 14, and holds the slide I029 away from the abutment I006.

The means for automatically controlling the non-add mechanism comprises a member I032 (Fig. 12) which is pivoted in the machine frame at I033. When the member I032 is in the position shown in Fig. 12, a surface I034 on said member is in position to engage the pin 259 on 5 the pawl I52 and thus depress said pawl so that it cannot engage the pin I51 (Fig. 3) on the cam I48, whereby the pinions I25 are left in central position during the down-stroke of the racks. The means for operating the member 10 I032 comprises a link I035 pivoted at its forward end to said member at I035 and slidably supported at its rear end in a slot I036 (Fig. 16)

in a lever I031. A contractile spring I038 nor mally holds the member I032 against a station- 15 ary portion I039, and thus holds the surface I 034 up out of the path of the pin 259. On the right hand lever I9 is a pin I040 adapted to engage a lug I04I on the link I035 and thus push the link forward to place the surface I034 in the path 20 of the pin 259. The lower end of the lever I031 is pivoted to the bed of the machine at I042. In its upper portion is an elongated opening I043 through which extends a stop screw I044 (Fig. 24). The spring I038 is anchored at a 25 point to the right of the link and consequently normally holds the link I035 and the lever I031 over toward the right to the extent determined by contact of the end Wall of the opening I 043 with the screw I044. When in such position the 30 lug I04I is out of the path of the pin I040. The upper end of the lever I031 is connected to a slide I045 (Fig. 24) having a lug I046 adapted to be engaged by one or more stop pins was on the stop plate mm. The spring was normally holds the slide I045 away from the abutment I008.

The means for automatically controlling the grand total-taking mechanism includes some of the parts just described, namely, the slide I045, 0 the lever I031, the pin I040, the link I035, and the spring I038. Referring to Figs. 2 and 3, a lever I049 is pivoted at I050, its free end overlying the pin I1I on the stem of the grand total or clear key I89. Said lever is connected to the 4 member I032 at I035 and hence is arranged to be swung by means of the spring I038 and the pin I040. When the key I69 is depressed by the lever I049, the grand total mechanism is operated as hereinbefore described. 50

Normally a total is automatically printed upon the stroke of the handle 21 next following a blank stroke, as explained in Patent No. 1,583,102. In order to prevent a total from being printed except when called for by the character of the bookkeeping form being used, I provide the means to be now described.

An arm I05I (Fig. 2) rigidly secured to the arm I59 extends rearwardly of the pivot I00. The rear end of the arm I05I normally lies be- 60 low a stop I052 which is herein shown as fixed to the slide I028. The stop I052 is therefore under the control of the carriage I. When a stop pin I030 on the stop plate IOI0 is not pressing against the lug I029 (Fig. 29), the spring I03I holds the stop I052 in the path of upward movement of the arm I 05I and thus prevents the arm I59 from swinging downwardly into position to depress the dog I52, thereby preventing the taklng of a total. When, however, 7 a stop pin I030 bears against the lug I029, the stop I052 is moved leftward out of the path of the arm I05I; consequently a total will be printed upon the second stroke of the handle, as described in Patent No. 1,583,102. 75 

